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add stringification macros

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Bruno Raoult
2022-12-03 16:11:34 +01:00
parent 4c8f0f3f72
commit 46c9c2da13
1 changed files with 8 additions and 2 deletions
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10
c/include/br.h
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@@ -1,4 +1,4 @@
/* bits.h - bits functions. /* br.h - misc macros.
* *
* Copyright (C) 2021-2022 Bruno Raoult ("br") * Copyright (C) 2021-2022 Bruno Raoult ("br")
* Licensed under the GNU General Public License v3.0 or later. * Licensed under the GNU General Public License v3.0 or later.
@@ -18,12 +18,18 @@
#ifndef _BR_H #ifndef _BR_H
#define _BR_H #define _BR_H
/* Indirect stringification. Doing two levels allows the parameter to be a
* macro itself. For example, compile with -DFOO=bar, __stringify(FOO)
* converts to "bar".
*/
#define __stringify_1(x...) #x
#define __stringify(x...) __stringify_1(x)
/* generate a (maybe) unique id. /* generate a (maybe) unique id.
*/ */
#define ___PASTE(x, y) x##y #define ___PASTE(x, y) x##y
#define __PASTE(x, y) ___PASTE(x, y) #define __PASTE(x, y) ___PASTE(x, y)
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
//__##prefix##__COUNTER__
/* see https://lkml.org/lkml/2018/3/20/845 for explanation of this monster /* see https://lkml.org/lkml/2018/3/20/845 for explanation of this monster
*/ */